/Engine/Source/Runtime/Engine/Classes/Kismet/KismetMathLibrary.h
Converts a RGB linear color to HSV (where H is in R, S is in G, and V is in B)
static [FLinearColor](API\Runtime\Core\Math\FLinearColor) RGBLinearToHSV ( [FLinearColor](API\Runtime\Core\Math\FLinearColor) RGB )